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Finding the Fourth Proportional to 376.32, 518.22 and 321.04

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Solution

The fourth proportional to 376.32, 518.22 and 321.04 is: 442.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.32 : 518.22 = 321.04 : x
  2. Step 2: Convert to fraction form
    376.32/518.22 = 321.04/x
  3. Step 3: Cross multiply
    376.32x = 518.22 × 321.04
  4. Step 4: Simplify right side
    376.32x = 166,369.35
  5. Step 5: Solve for x
    x = 166,369.35/376.32
  6. Step 6: Final answer
    x = 442.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.